Verify military access in military information controller.

[kpethtel]

This error recently started popping up in sentry:
http://sentry.vfs.va.gov/organizations/vsp/issues/163868/?environment=production&project=3&query=is%3Aunresolved+mobile&statsPeriod=14d

Conversation with va profile team here: https://dsva.slack.com/archives/C7TE0PFTL/p1678720475231219

Expected outcome:

The military information controller should confirm that the user can use the vet360 service. Add this line to the controller:

authorize :vet360, :military_access?

Also write specs for this case. We should expect a 403 response when the user does not have access.

[Tonksthebear]

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